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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-2646.477347
Energy at 298.15K-2646.479771
HF Energy-2646.113988
Nuclear repulsion energy123.384783
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3525 3324 82.23      
2 Σ 2124 2003 9.98      
3 Σ 607 572 1.42      
4 Π 625 589 44.97      
4 Π 625 589 44.97      
5 Π 355 335 4.34      
5 Π 355 335 4.34      

Unscaled Zero Point Vibrational Energy (zpe) 4107.7 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 3873.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/6-31G*
B
0.13218

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.327
C2 0.000 0.000 -1.108
Br3 0.000 0.000 0.686
H4 0.000 0.000 -3.393

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21893.01251.0662
C21.21891.79362.2852
Br33.01251.79364.0787
H41.06622.28524.0787

picture of bromoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability